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authorNikolay Borisov <nborisov@suse.com>2020-11-10 15:26:49 +0200
committerPetr Mladek <pmladek@suse.com>2020-11-11 16:55:39 +0100
commit584da076866f38ffb952efcc25af039f9551df81 (patch)
tree27b70e3112ae86ab91c64b6b4344c7be212772b0 /kernel/printk
parent8119c4332d253660e0a6b8748fe0749961cfbc97 (diff)
downloadlinux-584da076866f38ffb952efcc25af039f9551df81.tar.bz2
printk: ringbuffer: Reference text_data_ring directly in callees.
A bunch of functions in the new ringbuffer code take both a printk_ringbuffer struct and a separate prb_data_ring. This is a relic from an earlier version of the code when a second data ring was present. Since this is no longer the case remove the extra function argument from: - data_make_reusable() - data_push_tail() - data_alloc() - data_realloc() Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: John Ogness <john.ogness@linutronix.de> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'kernel/printk')
-rw-r--r--kernel/printk/printk_ringbuffer.c32
1 files changed, 15 insertions, 17 deletions
diff --git a/kernel/printk/printk_ringbuffer.c b/kernel/printk/printk_ringbuffer.c
index 24a960a89aa8..3b24c3aa55f4 100644
--- a/kernel/printk/printk_ringbuffer.c
+++ b/kernel/printk/printk_ringbuffer.c
@@ -559,11 +559,12 @@ static void desc_make_reusable(struct prb_desc_ring *desc_ring,
* on error the caller can re-load the tail lpos to determine the situation.
*/
static bool data_make_reusable(struct printk_ringbuffer *rb,
- struct prb_data_ring *data_ring,
unsigned long lpos_begin,
unsigned long lpos_end,
unsigned long *lpos_out)
{
+
+ struct prb_data_ring *data_ring = &rb->text_data_ring;
struct prb_desc_ring *desc_ring = &rb->desc_ring;
struct prb_data_block *blk;
enum desc_state d_state;
@@ -625,10 +626,9 @@ static bool data_make_reusable(struct printk_ringbuffer *rb,
* descriptors into the reusable state if the tail is pushed beyond
* their associated data block.
*/
-static bool data_push_tail(struct printk_ringbuffer *rb,
- struct prb_data_ring *data_ring,
- unsigned long lpos)
+static bool data_push_tail(struct printk_ringbuffer *rb, unsigned long lpos)
{
+ struct prb_data_ring *data_ring = &rb->text_data_ring;
unsigned long tail_lpos_new;
unsigned long tail_lpos;
unsigned long next_lpos;
@@ -669,8 +669,7 @@ static bool data_push_tail(struct printk_ringbuffer *rb,
* Make all descriptors reusable that are associated with
* data blocks before @lpos.
*/
- if (!data_make_reusable(rb, data_ring, tail_lpos, lpos,
- &next_lpos)) {
+ if (!data_make_reusable(rb, tail_lpos, lpos, &next_lpos)) {
/*
* 1. Guarantee the block ID loaded in
* data_make_reusable() is performed before
@@ -807,7 +806,7 @@ static bool desc_push_tail(struct printk_ringbuffer *rb,
* data blocks once their associated descriptor is gone.
*/
- if (!data_push_tail(rb, &rb->text_data_ring, desc.text_blk_lpos.next))
+ if (!data_push_tail(rb, desc.text_blk_lpos.next))
return false;
/*
@@ -1021,10 +1020,10 @@ static unsigned long get_next_lpos(struct prb_data_ring *data_ring,
* if necessary. This function also associates the data block with
* a specified descriptor.
*/
-static char *data_alloc(struct printk_ringbuffer *rb,
- struct prb_data_ring *data_ring, unsigned int size,
+static char *data_alloc(struct printk_ringbuffer *rb, unsigned int size,
struct prb_data_blk_lpos *blk_lpos, unsigned long id)
{
+ struct prb_data_ring *data_ring = &rb->text_data_ring;
struct prb_data_block *blk;
unsigned long begin_lpos;
unsigned long next_lpos;
@@ -1043,7 +1042,7 @@ static char *data_alloc(struct printk_ringbuffer *rb,
do {
next_lpos = get_next_lpos(data_ring, begin_lpos, size);
- if (!data_push_tail(rb, data_ring, next_lpos - DATA_SIZE(data_ring))) {
+ if (!data_push_tail(rb, next_lpos - DATA_SIZE(data_ring))) {
/* Failed to allocate, specify a data-less block. */
blk_lpos->begin = FAILED_LPOS;
blk_lpos->next = FAILED_LPOS;
@@ -1102,10 +1101,10 @@ static char *data_alloc(struct printk_ringbuffer *rb,
* Return a pointer to the beginning of the entire data buffer or NULL on
* failure.
*/
-static char *data_realloc(struct printk_ringbuffer *rb,
- struct prb_data_ring *data_ring, unsigned int size,
+static char *data_realloc(struct printk_ringbuffer *rb, unsigned int size,
struct prb_data_blk_lpos *blk_lpos, unsigned long id)
{
+ struct prb_data_ring *data_ring = &rb->text_data_ring;
struct prb_data_block *blk;
unsigned long head_lpos;
unsigned long next_lpos;
@@ -1132,7 +1131,7 @@ static char *data_realloc(struct printk_ringbuffer *rb,
return &blk->data[0];
}
- if (!data_push_tail(rb, data_ring, next_lpos - DATA_SIZE(data_ring)))
+ if (!data_push_tail(rb, next_lpos - DATA_SIZE(data_ring)))
return NULL;
/* The memory barrier involvement is the same as data_alloc:A. */
@@ -1397,7 +1396,7 @@ bool prb_reserve_in_last(struct prb_reserved_entry *e, struct printk_ringbuffer
if (r->text_buf_size > max_size)
goto fail;
- r->text_buf = data_alloc(rb, &rb->text_data_ring, r->text_buf_size,
+ r->text_buf = data_alloc(rb, r->text_buf_size,
&d->text_blk_lpos, id);
} else {
if (!get_data(&rb->text_data_ring, &d->text_blk_lpos, &data_size))
@@ -1421,7 +1420,7 @@ bool prb_reserve_in_last(struct prb_reserved_entry *e, struct printk_ringbuffer
if (r->text_buf_size > max_size)
goto fail;
- r->text_buf = data_realloc(rb, &rb->text_data_ring, r->text_buf_size,
+ r->text_buf = data_realloc(rb, r->text_buf_size,
&d->text_blk_lpos, id);
}
if (r->text_buf_size && !r->text_buf)
@@ -1549,8 +1548,7 @@ bool prb_reserve(struct prb_reserved_entry *e, struct printk_ringbuffer *rb,
if (info->seq > 0)
desc_make_final(desc_ring, DESC_ID(id - 1));
- r->text_buf = data_alloc(rb, &rb->text_data_ring, r->text_buf_size,
- &d->text_blk_lpos, id);
+ r->text_buf = data_alloc(rb, r->text_buf_size, &d->text_blk_lpos, id);
/* If text data allocation fails, a data-less record is committed. */
if (r->text_buf_size && !r->text_buf) {
prb_commit(e);